Inflammable and explosive gas detection enhanced infrared detection device

Abstract

The invention discloses a flammable and explosive gas detection enhanced infrared detection device, and particularly relates to the technical field of gas infrared detectors, the flammable and explosive gas detection enhanced infrared detection device comprises a mounting plate, a closed box is fixedly arranged on the front side of the mounting plate, and a gas infrared detector main body used for detecting gas is fixedly arranged on the rear wall in the closed box; a connecting pipe is fixedly arranged at the bottom end of the closed box, and a collecting cylinder is fixedly arranged at one end of the connecting pipe. According to the invention, the plurality of sampling heads are respectively installed in different detection areas, then air in each detection area is sucked into the extension hose, the air finally enters the closed box after a series of conduction, and detection is carried out under the action of the gas infrared detector main body, so that whether dangerous gas is contained in the gas is judged; in this way, a plurality of areas needing to be detected can be detected at the same time through one gas infrared detector body, the detection range is expanded, and the detection efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of gas infrared detectors, and more particularly to an enhanced infrared detection device for detecting flammable and explosive gases. Background Art

[0002] In chemical plants, laboratories, mines and other places, accidental gas leakage may occur. The leaked gas may be toxic and harmful, or flammable and explosive, which is very dangerous. Therefore, infrared gas detectors are often used in the above places to detect whether there are other suspicious gases in the air.

[0003] The principle of infrared gas detectors is not complicated. Since different gases absorb infrared waves to different degrees, infrared gas detectors detect gases by measuring the infrared absorption wavelength through infrared sensors.

[0004] In actual use, infrared gas detectors detect gas by detecting the natural flow of gas in the environment. The detection range is small, and one infrared gas detector can only detect one area. The detection efficiency needs to be improved.

[0005] In addition, during the detection process, the infrared gas detector will sound an alarm once it detects dangerous gas. However, the infrared gas detector itself may fail to detect due to its own faults, which will affect its effectiveness. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides an enhanced infrared detection device for detecting flammable and explosive gases to solve the problems arising from the above-mentioned background technology.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an enhanced infrared detection device for detecting flammable and explosive gases, comprising a mounting plate, a closed box fixedly provided on the front side of the mounting plate, a gas infrared detector body for detecting gas fixedly provided on the rear wall inside the closed box, the gas infrared detector body sensing and detecting dangerous gases in the air, a connecting pipe fixedly provided at the bottom end of the closed box, a collecting tube fixedly provided at one end of the connecting pipe, a plurality of shunt tubes fixedly provided at the outer end of the collecting tube, and a solenoid valve fixedly provided on the shunt tube, thereby concentrating air from various locations into the collecting tube and then passing it into the closed box;

[0008] One end of the diversion tube is sleeved with a sleeve and connected to the inner wall of the sleeve through a sealed bearing. One end of the sleeve is movably connected to the mounting plate through a damping bearing. An extension hose for expanding the detection range is fixedly provided at the outer end of the sleeve. The length of the extension hose can be adjusted by rotating the sleeve. The extension hose is wound around the outer end of the sleeve. A sampling head is fixedly provided at one end of the extension hose, and external air is sucked into the extension hose at the sampling head.

[0009] Furthermore, a plurality of reinforcement rings are fixedly provided in the wall of the extension hose to reinforce the extension hose. A limit plate is fixedly provided at the other end of the sleeve, and two mounting plates are fixedly provided at the outer end of the sampling head, which facilitate the installation and fixation of the sampling head.

[0010] Furthermore, a filter screen is provided at one end of the sampling head for filtering, a frame is fixed at the outer end of the filter screen, a connecting ring is provided inside the sampling head, the outer end of the connecting ring is connected to the inner wall of the sampling head by a thread, one end of the connecting ring extends to one end of the sampling head and is fixedly connected to the frame, and the filter screen is fixed at one end of the sampling head to filter solid impurities in the air.

[0011] Furthermore, an electric control box is fixedly provided on the top of the closed box, a cover is provided on the top of the electric control box and is connected to the cover by bolts, a circuit board is provided at the bottom end of the inside of the electric control box, a networking module and a memory stick are fixed on the circuit board, the memory stick is electrically connected to the main body of the gas infrared detector, the main body of the gas infrared detector can store the detected data in the memory stick, the networking module is electrically connected to all electrical components on the gas infrared detector, thereby performing online remote control through the network.

[0012] Furthermore, a box door is provided on the front side of the closed box and is movably connected to the box door by a hinge. A control panel, a speaker, and a warning light are fixedly provided on the front side of the box door. The control panel, the speaker, and the warning light are electrically connected to the gas infrared detector body. The gas infrared detector body can be manually controlled through the control panel. The speaker and the warning light send out alarm signals through sound and light when dangerous gas is detected. An external wire tube is fixedly provided on one side of the closed box, and the external wires are introduced into the closed box through the external wire tube.

[0013] Furthermore, a fan duct is fixedly provided at the bottom end of the closed box, a fan is provided inside the fan duct, the outer end of the fan is fixedly connected to the inner wall of the fan duct, and the air flow is driven by the fan to suck the external air into the closed box for detection. The other end of the connecting pipe is connected to the fan duct, and an exhaust duct is fixedly provided on one side of the closed box, and the exhaust duct is used to discharge the air entering the closed box. An air pump is fixedly provided on the exhaust duct, and the air pump can pressurize the discharged air, and can also be used alternately with the fan to avoid damage to the fan due to long-term continuous operation.

[0014] Furthermore, an explosion-proof barrel is provided on the top of the closed box, a connecting plate is fixedly provided on the outer end of the explosion-proof barrel, one end of the connecting plate is fixedly connected to the mounting plate, one end of the exhaust pipe extends to the inside of the explosion-proof barrel, a spiral tube is provided inside the explosion-proof barrel, the spiral tube can increase the flow path when the air is discharged, one end of the spiral tube is connected to the exhaust pipe, and the other end of the spiral tube is fixedly provided with an air outlet pipe, and one end of the air outlet pipe extends to one side of the explosion-proof barrel.

[0015] Furthermore, two branch pipes are fixedly provided at the outer end of the air outlet pipe, and a solenoid valve is fixedly provided on each branch pipe. A first gas storage tank for temporarily storing harmful gases is provided on the other side of the closed box. An air inlet pipe is fixedly provided on the top of the first gas storage tank, and a solenoid valve is fixedly provided on the air inlet pipe. One end of the air inlet pipe is connected to one end of one of the branch pipes through a quick connector. The detected dangerous gas enters the first gas storage tank for storage after being pressurized by the air pump and cannot be discharged directly.

[0016] A storage sleeve is provided at the bottom end of the first gas storage tank, a connecting rod is fixedly provided at the outer end of the storage sleeve, and one end of the connecting rod is connected to the closed box for fixing the first gas storage tank.

[0017] Furthermore, two second gas storage tanks are provided at the bottom end of the closed box, an inflation tube is fixedly provided at the outer end of the second gas storage tank, a valve is fixedly provided on the inflation tube, a conduit is fixedly provided at the top end of the second gas storage tank, an electromagnetic valve is fixedly provided on the conduit, and the two second gas storage tanks store pure air and pure carbon dioxide, respectively.

[0018] Furthermore, a closing hood and a mixing hood are fixedly provided at the top of the closed box. The mixing hood is arranged inside the closing hood. A plurality of air holes are provided on the mixing hood. Through the action of the air holes, the carbon dioxide and the air are mixed as evenly as possible. One end of the two conduits is respectively connected to the closing hood and the mixing hood. An exhaust pipe is fixedly provided at the bottom of the closing hood, and the mixed gas is discharged through the exhaust pipe.

[0019] Technical effects and advantages of the present invention:

[0020] 1. The present invention installs multiple sampling heads in different detection areas, and then draws the air in each detection area into an extended hose through the sampling head under the action of a fan. After a series of conductions, the air finally enters a closed box, and is detected by the gas infrared detector body inside the closed box to determine whether it contains dangerous gases. In this way, multiple areas that need to be detected can be detected simultaneously through a gas infrared detector body, thereby expanding the detection range and improving the detection efficiency.

[0021] 2. The present invention guides the air entering the closed box through the exhaust pipe, then passes through the spiral tube, and finally is discharged through the branch pipe at the outer end of the box door. The spiral tube extends the flow path of the air during exhaust. Once dangerous gas is detected, the presence of the spiral tube can leave enough time to input the dangerous gas into the first gas storage tank for storage before it is discharged, thereby preventing further leakage of the dangerous gas.

[0022] 3. The present invention stores pure air and carbon dioxide in two second gas storage tanks respectively. Before the gas infrared detector body is used or in the interval of overhauling the gas infrared detector body, the air and carbon dioxide are mixed in corresponding proportions to form a calibration gas. The gas infrared detector body detects whether there is carbon dioxide and the concentration of carbon dioxide in the calibration gas to determine whether the gas infrared detector body has a fault and whether the detection is effective, thereby avoiding the failure of the gas infrared detector body to affect its use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A perspective view of the present invention;

[0024] Figure 2 A perspective view of the present invention;

[0025] Figure 3 A perspective view of a closed box according to the present invention;

[0026] Figure 4 A three-dimensional half-section view of the closed box and explosion-proof tube of the present invention;

[0027] Figure 5 A three-dimensional half-section view of the closed box of the present invention;

[0028] Figure 6 For the present invention Figure 5 Enlarged view of part A in the middle;

[0029] Figure 7 It is a three-dimensional half-section view of the electric control box of the present invention;

[0030] Figure 8 It is a three-dimensional half-section view of the collecting tube of the present invention;

[0031] Figure 9 A three-dimensional half-section view of the sleeve of the present invention;

[0032] Figure 10 It is a three-dimensional half-section view of the sampling head of the present invention.

[0033] The accompanying drawings are marked as follows: 1. Mounting plate; 2. Enclosed box; 3. Box door; 4. External wire tube; 5. Collection tube; 6. Extension hose; 7. Sampling head; 8. Diverter tube; 9. Limit plate; 10. Control panel; 11. Speaker; 12. Warning light; 13. Air outlet pipe; 14. Explosion-proof cylinder; 15. Cover plate; 16. Electric control box; 17. Exhaust pipe; 18. Air pump; 19. Storage cover; 20. First air storage tank; 21. Air intake Tube; 22. Spiral tube; 23. Enclosed cover; 24. Gas infrared detector body; 25. Fan tube; 26. Connecting pipe; 27. Fan; 28. Second gas tank; 29. Conduit; 30. Mixing cover; 31. Exhaust pipe; 32. Air vent; 33. Circuit board; 34. Networking module; 35. Memory stick; 36. Mounting piece; 37. Reinforcement ring; 38. Connecting ring; 39. Frame; 40. Filter; 41. Casing. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] Refer to the instruction manual Figure 1-10 The present invention provides an enhanced infrared detection device for detecting flammable and explosive gases, comprising a mounting plate 1, a closed box 2 being fixedly provided on the front side of the mounting plate 1, a gas infrared detector body 24 for detecting gas being fixedly provided on the rear wall inside the closed box 2, and the gas infrared detector body 24 sensing and detecting dangerous gases in the air, a connecting pipe 26 being fixedly provided at the bottom end of the closed box 2, a collecting tube 5 being fixedly provided at one end of the connecting pipe 26, a plurality of shunt tubes 8 being fixedly provided at the outer end of the collecting tube 5, and a solenoid valve being fixedly provided on the shunt tube 8, so as to collect air from various places into the collecting tube 5 and then pass the air into the closed box 2;

[0036] One end of the diversion tube 8 is sleeved with a sleeve 41 and connected to the inner wall of the sleeve 41 through a sealed bearing. One end of the sleeve 41 is movably connected to the mounting plate 1 through a damping bearing. The outer end of the sleeve 41 is fixed with an extension hose 6 for expanding the detection range. The length of the extension hose 6 can be adjusted by rotating the sleeve 41. The extension hose 6 is wound around the outer end of the sleeve 41. A sampling head 7 is fixed at one end of the extension hose 6. External air is sucked into the extension hose 6 at the sampling head 7.

[0037] A plurality of reinforcement rings 37 are fixedly provided in the wall of the extension hose 6 to reinforce the extension hose 6. A limit plate 9 is fixedly provided at the other end of the sleeve 41. Two mounting plates 36 are fixedly provided at the outer end of the sampling head 7. The mounting plates 36 facilitate the installation and fixation of the sampling head 7.

[0038] A filter screen 40 for filtering is provided at one end of the sampling head 7, a frame 39 is fixedly provided at the outer end of the filter screen 40, a connecting ring 38 is provided inside the sampling head 7, the outer end of the connecting ring 38 is connected to the inner wall of the sampling head 7 by a thread, one end of the connecting ring 38 extends to one end of the sampling head 7 and is fixedly connected to the frame 39, and the filter screen 40 is fixed to one end of the sampling head 7 to filter solid impurities in the air.

[0039] During use, the closed box 2 is fixed on the wall through the mounting plate 1, and the gas infrared detector body 24 is enclosed in the closed box 2. Then, the sleeve 41 is rotated to loosen the extension hose 6 wrapped around the outer end of the sleeve 41, and then the sampling head 7 at one end of the extension hose 6 is fixed to the area to be detected through the mounting piece 36. The air in the area can enter the extension hose 6 through the sampling head 7, and then enter the sleeve 41 along the extension hose 6, and then be introduced from the sleeve 41 along the diversion pipe 8 into the collection tube 5. A plurality of diversion pipes are fixed on the outer end of the collection tube 5. Tube 8, there are multiple corresponding extension hoses 6 and sampling heads 7, different sampling heads 7 are installed in different areas that need to be detected, and the air in all areas will flow to the inside of the collecting tube 5 and then enter the closed box 2 through the connecting tube 26. The air entering the closed box 2 will be detected under the action of the gas infrared detector body 24 to determine whether it contains dangerous gases. In this way, multiple areas that need to be detected can be detected at the same time through one gas infrared detector body 24, which expands the detection range and improves the detection efficiency.

[0040] Once dangerous gas is detected, it means that a dangerous gas leak has occurred in a certain detection area. At this time, the gas infrared detector body 24 will remotely transmit the detection results, and then the relevant personnel will remotely control all the solenoid valves on the shunt pipes 8 to close, and then open the solenoid valves on each shunt pipe 8 separately in turn. Therefore, when the solenoid valve on one of the shunt pipes 8 is opened, the other solenoid valves are in a closed state. In this way, each area is detected separately in turn until it is determined which area has a leak.

[0041] In order to facilitate the remote control of the detector, Figure 3 、 5As shown in Figure 7, an electric control box 16 is fixedly provided on the top of the closed box 2, and a cover plate 15 is provided on the top of the electric control box 16 and connected to the cover plate 15 by bolts. A circuit board 33 is provided at the bottom end of the electric control box 16, and a networking module 34 and a memory stick 35 are fixed on the circuit board 33. The memory stick 35 is electrically connected to the gas infrared detector body 24. The gas infrared detector body 24 can store the detected data in the memory stick 35. The networking module 34 is electrically connected to all electrical components of the gas infrared detector, so as to perform online remote control through the network.

[0042] The front side of the closed box 2 is provided with a box door 3 and is movably connected to the box door 3 by a hinge. The front side of the box door 3 is fixedly provided with a control panel 10, a speaker 11, and a warning light 12. The control panel 10, the speaker 11, and the warning light 12 are electrically connected to the gas infrared detector body 24. The gas infrared detector body 24 can be manually controlled through the control panel 10. The speaker 11 and the warning light 12 send out alarm signals through sound and light when dangerous gas is detected. An external wire tube 4 is fixedly provided on one side of the closed box 2, and the external wires are introduced into the closed box 2 through the external wire tube 4.

[0043] The detector is connected to the network through the networking module 34, so all electrical components on the detector can be remotely controlled through the network. At the same time, the detector requires electricity to maintain operation, so the wires can be introduced into the closed box 2 through the external wire tube 4, so that the detector can obtain electricity. The external wire tube 4 can protect the wires and prevent the heat emitted by the wires during use from contacting flammable and explosive gases and causing explosions. In order to improve the sealing of the closed box 2, the external wire tube 4 can be filled with sealing putty when the wires are introduced. Once the gas infrared detector body 24 detects dangerous gas, the speaker 11 and the warning light 12 will work at the same time, and issue an alarm through sound and light to serve as a reminder.

[0044] The reason why the detected air flows into the closed box 2 is that Figure 1-5 As shown, a fan tube 25 is fixedly provided at the bottom end of the closed box 2, and a fan 27 is provided inside the fan tube 25. The outer end of the fan 27 is fixedly connected to the inner wall of the fan tube 25. The air flow is driven by the fan 27 to suck the external air into the closed box 2 for detection. The other end of the connecting tube 26 is connected to the fan tube 25. An exhaust pipe 17 is fixedly provided on one side of the closed box 2. The exhaust pipe 17 is used to discharge the air entering the closed box 2. An air pump 18 is fixedly provided on the exhaust pipe 17. The air pump 18 can pressurize the discharged air and can also be used alternately with the fan 27 to avoid damage to the fan 27 due to long-term continuous operation.

[0045] An explosion-proof cylinder 14 is provided on the top of the closed box 2, and a connecting plate is fixedly provided at the outer end of the explosion-proof cylinder 14. One end of the connecting plate is fixedly connected to the mounting plate 1. One end of the exhaust pipe 17 extends to the inside of the explosion-proof cylinder 14. A spiral tube 22 is provided inside the explosion-proof cylinder 14. The spiral tube 22 can increase the flow path when the air is discharged. One end of the spiral tube 22 is connected to the exhaust pipe 17, and the other end of the spiral tube 22 is fixedly provided with an outlet pipe 13. One end of the outlet pipe 13 extends to one side of the explosion-proof cylinder 14.

[0046] Two branches are fixedly provided at the outer end of the air outlet pipe 13, and a solenoid valve is fixed on each branch. A first gas storage tank 20 for temporarily storing harmful gases is provided on the other side of the closed box 2. An air inlet pipe 21 is fixedly provided at the top of the first gas storage tank 20, and a solenoid valve is fixed on the air inlet pipe 21. One end of the air inlet pipe 21 is connected to one end of one of the branches through a quick connector. The detected dangerous gas enters the first gas storage tank 20 for storage after being pressurized by the air pump 18 and cannot be discharged directly.

[0047] A storage sleeve 19 is provided at the bottom end of the first gas storage tank 20 , and a connecting rod is fixedly provided at the outer end of the storage sleeve 19 . One end of the connecting rod is connected to the closed box 2 for fixing the first gas storage tank 20 .

[0048] Since the connecting pipe 26 is connected to the fan pipe 25, when the fan 27 inside the fan pipe 25 is working, suction is generated inside the fan pipe 25, so that the air in each detected area flows under the action of the suction and eventually enters the closed box 2. After the air enters the closed box 2, it is discharged through the exhaust pipe 17. The air pump 18 on the exhaust pipe 17 has two functions. First, it can replace the fan 27 to suck air into the closed box 2 after the fan 27 has been working for a long time, thereby preventing the fan 27 from being damaged by long-term continuous operation. Second, it can pressurize the discharged air.

[0049] When no dangerous gas is detected in the air, the air entering the closed box 2 is discharged through the exhaust pipe 17 and enters the spiral tube 22. One end of the spiral tube 22 is connected to the air outlet pipe 13, and the outer end of the air outlet pipe 13 is provided with two branches. After passing through the spiral tube 22, the air enters the air outlet pipe 13 and is discharged through one of the branches at the outer end of the air outlet pipe 13. When the gas infrared detector body 24 detects that the air contains dangerous gas, the remote control air pump 18 is turned on to pressurize the dangerous gas. At the same time, the solenoid valve on one of the branches at the outer end of the air outlet pipe 13 is closed, and the solenoid valve on the other branch is opened. The pressurized air enters the first gas storage tank 20 for storage through the other branch and the air inlet pipe 21 to avoid leakage of dangerous gas. Since the length of the spiral tube 22 is long, it takes a long time for the air to pass through the spiral tube 22. The existence of the spiral tube 22 allows enough time to be left when dangerous gas is detected, and the dangerous gas is input into the first gas storage tank 20 for storage before it is discharged.

[0050] In order to detect the sensitivity of the gas infrared detector body 24, as Figure 4-6 As shown, two second gas tanks 28 are provided at the bottom end of the closed box 2, an inflation tube is fixedly provided at the outer end of the second gas tank 28, a valve is fixedly provided on the inflation tube, a conduit 29 is fixedly provided at the top end of the second gas tank 28, and an electromagnetic valve is fixedly provided on the conduit 29. The two second gas tanks 28 store pure air and pure carbon dioxide, respectively.

[0051] A closing cover 23 and a mixing cover 30 are fixedly provided at the top end of the closed box 2. The mixing cover 30 is arranged inside the closing cover 23. A plurality of air holes 32 are provided on the mixing cover 30. Under the action of the air holes 32, the carbon dioxide and the air are mixed as evenly as possible. One end of the two conduits 29 is connected to the closing cover 23 and the mixing cover 30 respectively. An exhaust pipe 31 is fixedly provided at the bottom end of the closing cover 23, and the mixed gas is discharged through the exhaust pipe 31.

[0052] Pure air and carbon dioxide are stored in the two second gas storage tanks 28 respectively. Before the gas infrared detector body 24 is used or in the interval of overhauling the gas infrared detector body 24, the solenoid valves on the two conduits 29 are opened, so that the air and carbon dioxide are discharged into the interior of the closed cover 23 and the mixing cover 30 respectively along the two conduits 29. The gas entering the mixing cover 30 will eventually enter the closed cover 23 through the air vent 32, so that the carbon dioxide and air are fully mixed to form a calibration gas. The concentration of carbon dioxide in the calibration gas can also be adjusted by controlling the degree of opening and closing of the solenoid valve. After the carbon dioxide and air are mixed, they are discharged into the closed box 2 through the exhaust pipe 31. At this time, the gas infrared detector body 24 can detect the carbon dioxide in the calibration gas. If carbon dioxide is detected and the detected concentration is consistent with the actual concentration, it means that the gas infrared detector body 24 has no fault and can be used normally. If no carbon dioxide is detected, or the detected concentration is significantly different from the actual concentration, it means that the gas infrared detector body 24 itself has a fault and needs to be repaired in time to avoid the gas infrared detector body 24 from failing to detect and affecting its use effect.

[0053] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An enhanced infrared detection device for detecting flammable and explosive gases, comprising a mounting plate (1) for mounting and fixing, a closed box (2) fixedly provided on the front side of the mounting plate (1), and a gas infrared detector body (24) for detecting gas fixedly provided on the rear wall inside the closed box (2), characterized in that: A connecting pipe (26) for introducing air is fixedly provided at the bottom end of the closed box (2), a collecting tube (5) is fixedly provided at one end of the connecting pipe (26), a plurality of shunt pipes (8) for connecting a plurality of detection areas are fixedly provided at the outer end of the collecting tube (5), and a solenoid valve is fixedly provided on the shunt pipe (8); One end of the shunt pipe (8) is sleeved with a sleeve (41) and connected to the inner wall of the sleeve (41) via a sealed bearing. One end of the sleeve (41) is movably connected to the mounting plate (1) via a damping bearing. An extension hose (6) for expanding the detection range is fixedly provided at the outer end of the sleeve (41). The extension hose (6) is wound around the outer end of the sleeve (41). One end of the extension hose (6) is fixedly provided with a sampling head (7) for inhaling the air to be detected.

2. The enhanced infrared detection device for detecting flammable and explosive gases according to claim 1, characterized in that: A plurality of reinforcing rings (37) for reinforcing the extension hose (6) are fixedly provided in the wall of the extension hose (6); a limit plate (9) for limiting the position of the extension hose (6) is fixedly provided at the other end of the sleeve (41); and two mounting plates (36) for mounting the sampling head (7) are fixedly provided at the outer end of the sampling head (7).

3. The enhanced infrared detection device for detecting flammable and explosive gases according to claim 1, characterized in that: A filter screen (40) having a filtering function is provided at one end of the sampling head (7), a frame (39) is fixedly provided at the outer end of the filter screen (40), a connecting ring (38) is provided inside the sampling head (7), the outer end of the connecting ring (38) is connected to the inner wall of the sampling head (7) through a thread, and one end of the connecting ring (38) extends to one end of the sampling head (7) and is fixedly connected to the frame (39).

4. The enhanced infrared detection device for detecting flammable and explosive gases according to claim 1, characterized in that: An electric control box (16) is fixedly provided at the top of the closed box (2), a cover plate (15) is provided at the top of the electric control box (16) and is connected to the cover plate (15) by bolts, a circuit board (33) is provided at the bottom of the electric control box (16), a networking module (34) for facilitating remote control and a memory bar (35) for storing detection data are fixedly provided on the circuit board (33), and the memory bar (35) is electrically connected to the gas infrared detector body (24).

5. The enhanced infrared detection device for detecting flammable and explosive gases according to claim 1, characterized in that: The front side of the closed box (2) is provided with a box door (3) and is movably connected to the box door (3) via a hinge. The front side of the box door (3) is fixedly provided with a control panel (10), a speaker (11), and a warning light (12). The control panel (10), the speaker (11), and the warning light (12) are electrically connected to the main body (24) of the gas infrared detector. An external wire tube (4) for protecting the wires is fixedly provided on one side of the closed box (2).

6. The enhanced infrared detection device for detecting flammable and explosive gases according to claim 1, characterized in that: A fan tube (25) is fixedly provided at the bottom end of the closed box (2), a fan (27) for driving air flow is provided inside the fan tube (25), the outer end of the fan (27) is fixedly connected to the inner wall of the fan tube (25), and the other end of the connecting tube (26) is connected to the fan tube (25). An exhaust tube (17) is fixedly provided on one side of the closed box (2), and an air pump (18) that can replace the fan (27) is fixedly provided on the exhaust tube (17).

7. The enhanced infrared detection device for detecting flammable and explosive gases according to claim 6, characterized in that: An explosion-proof cylinder (14) is provided on the top of the closed box (2), a connecting plate with a connecting and fixing function is fixedly provided at the outer end of the explosion-proof cylinder (14), one end of the connecting plate is fixedly connected to the mounting plate (1), one end of the exhaust pipe (17) extends into the interior of the explosion-proof cylinder (14), a spiral tube (22) for extending the air circulation path is provided inside the explosion-proof cylinder (14), one end of the spiral tube (22) is connected to the exhaust pipe (17), and the other end of the spiral tube (22) is fixedly provided with an air outlet pipe (13), and one end of the air outlet pipe (13) extends to one side of the explosion-proof cylinder (14).

8. The enhanced infrared detection device for detecting flammable and explosive gases according to claim 7, characterized in that: Two branch pipes are fixedly provided at the outer end of the air outlet pipe (13), and a solenoid valve is fixedly provided on the branch pipes. A first gas storage tank (20) for temporarily storing harmful gases is provided on the other side of the closed box (2). An air intake pipe (21) is fixedly provided at the top end of the first gas storage tank (20), and a solenoid valve is fixedly provided on the air intake pipe (21). One end of the air intake pipe (21) is connected to one end of one of the branch pipes via a quick connector. The bottom end of the first gas storage tank (20) is provided with a storage sleeve (19) for placing the first gas storage tank (20), and the outer end of the storage sleeve (19) is fixed with a connecting rod, one end of which is connected to the closed box (2).

9. The enhanced infrared detection device for detecting flammable and explosive gases according to claim 1, characterized in that: Two second gas storage tanks (28) are provided at the bottom end of the closed box (2); an inflation pipe for inflating the interior of the second gas storage tank (28) is fixedly provided at the outer end thereof; a valve is fixedly provided on the inflation pipe; a guide tube (29) is fixedly provided at the top end of the second gas storage tank (28); and an electromagnetic valve is fixedly provided on the guide tube (29).

10. The enhanced infrared detection device for detecting flammable and explosive gases according to claim 9, characterized in that: A sealing cover (23) and a mixing cover (30) are fixedly provided at the top end of the sealing box (2). The mixing cover (30) is arranged inside the sealing cover (23). A plurality of ventilating holes (32) are provided on the mixing cover (30). One end of the two conduits (29) is connected to the sealing cover (23) and the mixing cover (30) respectively. An exhaust pipe (31) for exhausting the mixed gas is fixedly provided at the bottom end of the sealing cover (23).

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